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MCQs on The s-Block Elements
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MCQs on The s-Block Elements
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21 Questions

1. A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is
2. Suspension of slaked lime in water is known as
3. Dehydration of hydrates of halides of calcium, barium and strontium i.e., CaCl26H3O, BaCl2.2H2O, SrCl2.2H2O, can be achieved by heating. These become wet on keeping in air. Which of the following statements is correct about these halides?
4. Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?
5. Which of the following elements does not form hydride by direct heating with dihydrogen?
6. Which of the following statements is true about Ca(OH)2 ?
7. In the synthesis of sodium carbonate, the recovery of ammonia is done by treating NH4Cl with Ca(OH)2. The by-product obtained in this process is
8. Dehydration of hydrates of halides of calcium, barium and strontium i.e., CaCl26H3O, BaCl2.2H2O, SrCl2.2H2O, can be achieved by heating. These become wet on keeping in air. Which of the following statements is correct about these halides?
9. The reducing power of a metal depends on various factors. Suggest the factor which makes Li, the strongest reducing agent in aqueous solution.
10. Amphoteric hydroxides react with both alkalies and acids. Which of the following Group 2 metal hydroxides is soluble in sodium hydroxide?
11. Which of the following statements is true about Ca(OH)2 ?
12. The solubility of metal halides depends on their nature, lattice enthalpy and hydration enthalpy of the individual ions. Amongst fluorides of alkali metals, the lowest solubility of LiF in water is due to
13. Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?
14. The reducing power of a metal depends on various factors. Suggest the factor which makes Li, the strongest reducing agent in aqueous solution.
15. When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution is due to
16. A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is
17. "The alkali metals are low melting. Which of the following alkali metal is expected to melt if the room temperature rises to 30°C?"
18. Some of the Group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides, the one which is soluble in ethanol is
19. "The alkali metals are low melting. Which of the following alkali metal is expected to melt if the room temperature rises to 30°C?"
20. By adding gypsum to cement
21. Amphoteric hydroxides react with both alkalies and acids. Which of the following Group 2 metal hydroxides is soluble in sodium hydroxide?

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